Question

Classify each of the following matrices as a row, a column, a square, a diagonal, a scalar, a unit, an upper traingular, a lower triangular matrix.

`[(3, 0, 0),(0, 5, 0),(0, 0, 1/3)]`

Answer 1

Let A = `[(3, 0, 0),(0, 5, 0),(0, 0, 1/3)]`

As matrix A has all its non-diagonal elements zero.
∴ A is a diagonal martix.